Introduction to Microprocessor and Microcontroller.pdf

Introduction to Microprocessor and Microcontroller

1. AVR Microcontroller

Introduction to Microprocessor
&
Microcontroller

2. Outlines of Session

What is a Microprocessor?

What is a Microcontroller?

Differences between Microprocessor and Microcontroller

Criteria for choosing a microcontroller

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3. What is a Microprocessor?

> A microprocessor is a controlling unit of a micro-computer wrapped
inside a small chip.

>It performs Arithmetic Logical Unit (ALU) operations and
communicates with the other devices connected with it.

>It is a single Integrated Circuit in which several functions are
combined.

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4. What is a Microcontroller?

+ A microcontroller is a chip optimized to control electronic devices.

>It is stored in a single integrated circuit which is dedicated to
performing a particular task and execute one specific application.

>It is specially designed circuits for embedded applications and is
widely used in automatically controlled electronic devices.

> It contains memory, processor, and programmable I/O.
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5. Differences between Microprocessor and Microcontroller

Contains only CPU: RAM, ROM, 1/0 timer are
separately provided

Designer decides on the amount of ROM, RAM and
1/0 ports

Doesn't support bit addressability
Better for multi tasking

General Purpose

Architecture : Von numann

High Speed and High Cost

MP based system requires more hardware to be
interfaced

8085, 8086, core2 duo, core i7 are examples of intel
ci Processor

CPU, RAM,ROM,l/O timer are all on a single chip

Fix amount of on chip ROM, RAM and 1/0 ports

Supports bit addressability
Weak for multi tasking
Single Purpose
Architecture: Harvard

Low Speed and Low Cost

MC based system requires less hardware to be
interfaced

AVR, PIC, ARM, 8051 are some of the

microcontroller family ll

6. Microprocessor Vs Microcontroller

General
Purpose
Microprocessor Serial
COM Port

Microprocessor

SS
œu ROM RAM
&
Timer Serial COM 1/0 Port
Port
ADC

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7. Criteria for choosing a microcontroller

1) It must meet the task at hand efficiently and cost effectively.

Decide 8,16 or 32 bit controller for computing task.
* Other considerations in this category are

a) Speed

b) Packaging (Dual in line or Flat package)

c) Power consumption

d) On chip RAM and ROM

e) Number of I/O pins and timer on chip

f) Ease of Up gradation

g) Cost per unit

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8. 2) How easy it is to develop products around it

+ Availability of assembler, debugger, compiler, third party vendor
support

3) MC should be available in needed quantities both now and in
future.

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9. Thank You